Pawl-and-ratchet driving mechanism.



, w EVENSEN PAWL AND RATCHET DRIVING MECHANISM.

APPLICATION FILED MAR. 12. 19I5- Patented Dec. 14, 1915.

nrurnp srirrns WILLIAM EVENSEN, or cnroaeo, ILLInors, ASSIGNGR TO THE eoss remains ranss co r Irena, or CBIOAGO, rrnrnors, a GOEPORATIGN or ILLINOIS.

EAWL-AND-BA'JJCHET DRIVING MECHANISM.

To all whom it may concern Be it known that I, VILLIAM EVENSEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pawl-and-Ratchet Driving Mechanism, of which the following is a specification, reference being had to the accompanying drawings. 7

My invention relates to pawl and ratchet driving mechanism especially designed for i use in connection with the inking mechanism of a printing press, in connection with which it is shown in my drawings.

It is the object of my invention to provide an improved silent ratchet mechanism applicable to the requirements of sucha device in connection with inking mechanisms, by reason of which the inking roll of an ink fountain may be given a positive intermittent rotation and the driving pawl may be lifted clear of its cooperating ratchet when not in operative engagement therewith or may be readily lifted and automatically held out of operative engagement whenever it is desired to stop the rotation of the inking roll. The means by which I have accomplished this object are illustrated in the accompanying drawings and are hereinafter specifically described.

That which I believe to be new and desire to cover by this application is set forth in the claims.

In the drawings: Figure 1 is a side view of a' portion of a press illustrating my improved silent ratchet mechanism in connection with an ink fountain: Fig. 2 is a central vertical section through the parts shown in Fig. 1, being taken substantially on line 22 of said figure; and Fig. 8 is an enlarged detail showing the means for holding the pawl out of operative position, being substantially a section taken on line 33 of Fig. 1, but with the pawl lifted-and" held in its inoperative position. i

Referring to the several figures of the drawings in which corresponding parts are indicated by the same reference characters,

10 indicates the framework of a press havme an inking roller 11 journaled therein within an ink trough 12 by means of a shaft 13. Bevolubly mounted upon the outer end ofthe shaft 13 is a-sleeve l4 having formed Specification of Letters ?atent.

Patented Dec. 1st, 1915.

Application filed March 12, 1315. Serial No. 13,871.

reciprocated by any suitable source of power for driving the sleeve 14 alternately in opposite directions. Rising from the sleeve 14 is an arm 17 by which the said sleeve may be rotated manually, as desired. An arcshaped plate 18 is attached to the framework 10 in any suitable manner, serving in connection with an arc-shaped plate 19 mounted upon the arm 17 to guide the arm 17 as it is actuated through the medium of the sleeve 14 and the rack-bar 16, as hereinafter described. The arc-shaped plate 18 is provided with a longitudinally-extending slot 20 in which a block 21 is adapted to be adjustably secured for limiting the counterclockwise movement of the arm 17 in Fig. 1. A roller 22 is revolubly mounted adjacent to the rack-bar 16 for holding the said rackbar in proper engagement with the segmental rack 15. Inasmuch as the parts so far described are well-known in the art, it is not believed to be necessary to further desc be them herein.

A ratchetwheel 23 is fixed upon the shaft 18 adjacent to the sleeve 14, upon a laterallyextending hub 24 of which is revolubly mounted a split friction-ring 25, the said friction-ring being held against withdrawal from the said hub 24 by means of a washer 26 secured in any suitable manner to the end of the shaft 13. Rising from the friction sleeve 25 is an arm 27 having pivotally connected to its upper end a link 28 which in turn is pivotally connected to a dog or pawl 29 which is pivotally mounted by means of a bolt 30 upon the arm 17 in position to engage the teeth of the ratchet-wheel 23.

As will be readily understood from a study of Fig. 1, when the rack-bar 16 is raised. serving to turn the sleeve 11 and the arm 17 in clockwise direction in Fig. 1, the pawl 29 ismoved in the same direction with the said arm 17. The friction-ring 25, however, grips the hub 2% of the ratchet wheel 23 so as to resist a like movement of the said ring 25, thereby exerting a backward and downward pull upon the pawl 29 through the medium of the link 28. The operative end of the pawl 29 is consequently moved downward into operative engagement with theratchet wheel, causing during the continued clockwise movement of thearm 17 in said Fig. 1 a corresponding clockwise movement of the ratchet-wheel 23, the shaft 13' and the inking roller 11. Upon the reversal of the direction of movement of the rack-bar 16, the sleeve 1% and the arm 17 will likewise have their direction of movement changed, serving to carry the pawl 29 in counterclockwise direction in said Fig. 1. The frictionring 25 again resists a like movement of itself relative to the hub 24, whereby the operative end of the 'pawl 29 receives an upward impulse through the medium of the link 28, serving to swlng the pawl 29 outof contact with the teeth of the ratchet-wheel, the frictional engagement of the split sleeve be reciprocated upon the manual actuation of the arm 17, thus making it necessary that a'proper yielding connection be provided between the rack-bar-lG and its normal actuating means. Inasmuch as connections of this't'ype are in common use and form no part of my present invention, it is believed to be unnecessary to illustrate them herein.

Whenever it is desired to stop the operation of the inking fountain-without stopping the operation of the rack-bar 16, this may be accomplished by raising the dog or pawl 29 out of contact with the ratchet wheel 23 until the recess 31 formed in the side face of the deg 29 is brought into engagement with a pin 32 which is pressed outward for such engagement at the proper moment by a spring 33 mounted in the socket 3st in the arm 17 within which the pin 32 is slidably mounted. The spring 33 is designed to be of such strength that the dog 29 will be held in its turned inoperative position, as just described, against the pull of the friction sleeve 25 through the medium of the link 28. as the sleeve is actuated.

IVhat I claim as my invention anddesire to secure by Letters Patent. is-

1. In a pawl and ratchet driving mechanism, the combination of an oscillatory driving member, a member to be driven revolubly mounted relative to the said driving member, a pawl carried by one of said members, a ratchet-wheel fixed against rotation relative to the other of said members in position to be operatively engaged by said pawl, a friction-ring revolubly mounted on said ratchet-wheel, and connections between said friction-ring and said pawl serving to draw said pawl into operative engagement with the ratchet-wheel upon the rotation of said driving member in one direction and to throw thesaid pawl out of contactwith V d ratchet-wheel upon the rotation of said driving member in the opposite direction.

2. In a pawl and ratchet driving mechanism, the combinationof an oscillatory driving member, a member to bedriven revolubly mountedrelative to said driving member, a pawl pivotally mounted on said driving member, a'ratchet-wheel fixedai'pon driving member in one direction and to f throw the said pawl out of contact with said ratchet-wheel upon the rotation of said driving member in the opposite direction.

3. In a pawland ratchet'driving mecha nism, the combination of a shaft, a sleeve revolubly mounted thereon, means for rocking one of said members alternately in opposite directions, a pawl carriedby one of said members, a ratchet-wheel fixed against rotation relative to the other of said members in position to be operatively engaged by said pawl, a friction-ring revolubly mounted on said ratchet-wheel, and connections between said friction-ringfand said pawl serving to draw said pawl into operative engagement with the ratchet-wheelupon the rotation of said driving member in one direction and to throw the said pawl out of contact with said ratchet-wheel upon the r0- tation of said driving Inemberin the opposite direction.

4:. In a pawl and ratchet driving mecha- V nism, the combination of a shaft, a sleeve revolubly mounted thereon. means for rocking said sleeve about said shaft, a pawl pivotally mounted on said sleeve, a ratchetwheel fixed on said shaft in position to be operatively engaged by said pawl a friction-ring revolubly mounted on said ratchetwheel, and connections between said fric tion-ring and said pawl serving to draw said pawl into operative engagement with the ratchet-wlieel upon the rotation of said driving member in one direction and to throw the said pawl out of contact. with said ratchet-wheel upon the rotation of said driving member in the opposite direction.

5. In a pawl and ratchetdriving mechanism, the combination of an oscillatory driving member, a member "to be driven revolubly mounted relative to the said driv ing member, a pawl carried bv one of said 'members, a ratchet-wheel fixed against rotation-relativeto the other of said members in position to be operatively engaged by said pawl, a friction-ring revolubly mounted on a hub extending from one side of said ratchet-wheel, and connections betweensaid friction-ring and said pawl serving to draw said pawl into operative engagement with the ratchet-wheel upon the rotation of said driving member in one direction and to throw the said pawl out of contact with said ratchet-wheel upon the rotation of said driving member in the opposite direction.

6. In a pawl and ratchet driving mechanism, the combination of an oscillatory driving member, a member to be driven revolubly mounted relative to the said driving member, a pawl carried by one of said members, a ratchet-wheel fixed against rotation relative to the other of said members in po sition to be operatively engaged by said pawl, a split ring revolubly mounted on a hub extending from one side of said ratchetwheel and frictionally engaging the same, and connections between said friction-ring and said pawl serving to draw said pawl into operative engagement with the ratchetwheel upon the rotation of said driving member in one direction and to throw the said pawl out of contact with said ratchetwheel upon the rotation of said driving member in the opposite direction.

7. In a pawl and ratchet mechanism, the combination of a shaft, a sleeve revolubly mounted thereon, means for rocking said sleeve about said shaft, an arm fixed on said sleeve, a pawl pivotally mounted on said arm, a ratchet-wheel fixed on said shaft in position to be operatively engaged by said pawl, a friction-ring revolubly mounted on said ratchet-wheel, and a link pivotally connecting said friction ring with said pawl serving to draw said pawl into operative engagement with the ratchet-wheel upon the rotation of said sleeve in one direction and to throw the said pawl out of contact with said ratchet-wheel upon the rotation of said sleeve in the opposite direction.

8. In a pawl and ratchet driving mechanism, the combination of an oscillatory driving member, a member to be driven revolubly mounted relative to the said driving member, a pawl carried by one of said members, a ratchet-wheel fixed against rotation relative to the other of said members in position to be operatively engaged by said pawl, a'friction-ring revolubly mounted on said ratchet-wheel, connections between said friction-ring and said pawl serving to draw said pawl into operative engagement with the ratchet-wheel upon the rotation of said driving member in one direction and to throw the said pawl out of contact with said ratchetwheel upon the rotation of said driving member in the opposite direction, and means adapted automatically to hold said pawl turned out of operative engagement with the ratchetwheel when the pawl has been turned to a predetermined position.

9. In a pawl and ratchet dirving mechanism, the combination of an oscillatory driving member, a member to be driven rev olubly mounted relative to the said driving member, a pawl carried by one of said members, a ratchet-wheel fixed against rotation relative to the other of said members in position to be operatively engaged by said pawl, a friction-ring revolubly mounted on said ratchet-wheel, connections between said friction-ring andsaid pawl serving to draw said pawl into operative engagement with the ratchet-wheel upon the rotation of said driving member in one direction and to throw the said pawl out of contact with said ratchet-wheel upon the rotation of said driving member in the opposite direction, and spring-actuated means adapted to hold said pawl turned out of operative engagement with the ratchet-wheel when the pawl has been turned to a predetermined position.

10. In a pawl and ratchet driving mechanism, the combination of an oscillatory driving member, a member to be driven revolubly mounted relative to the said driving member, a pawl carried by one of said mem bers, a ratchetwheel fixed against rotation relative to the other of said members in posi tion to be operatively engaged by said pawl,

a friction-ring revolubly mounted on said ratchet-wheel, connections between said friction-ring and said pawl serving to draw said pawl into operative engagement with the ratchet-wheel upon the rotation of said driving member in one direction and to throw the said pawl out of contact with said ratchet-wheel upon the rotation of said driving member in the opposite direction, and means adapted to lock the said pawl yieldingly in turned position relative to said driving means when turned to a predetermined position out of operative engagement with said ratchet-wheel.

11. In a pawl and ratchet driving mechanism, the combination of an oscillatory driving member, a member to be driven revolubly mounted relative to the said driving member, a pawl carried by one of said members, a ratchet-wheel fixed against rotation relative to the other of said members in position to be operatively engaged by said pawl, a friction-ring revolubly mounted on said ratchet-wheel, connections between said friction-ring and said pawl serving to draw said pawl into operative engagement with the ratchet-wheel upon the rotation of said driving member in one direction and to throw the said pawl out of contact with said ratchet-wheel upon the rotation of said driving member in the opposite direction, and spring-actuated means adapted to hold said pawl turned out of operative engagement with the ratchet-wheel when the pawl has been turned to a predetermined positurning relative to said driving means when tion, said spring-actuated means comprising the pawl is-tui-ned to bring the said recess a pin slidably mounted in said driving meminto alinement with said pin.

her and adapted to bear against said pawl, WILLIAM EVENSEN. 5 and a spring serving to force said pin into Witnesses:

engagement with a suitable recess in said G40. ABBOTT,

pawl for holding the pawl yieldingly against JOHN M. GARLSON.

Copies of this patent may be obtained for five cents each, by addressing the Ceminissione: o f'lac ents Washington, D. C. v 

